The grandson of one of Vail's co-founders who died Thursday in an avalanche that also trapped - temporarily - three others, was a graduate of the Park City Winter School. KPCW's Leslie Thatcher has more.

A report issued by the Utah Avalanche Forecast Center says that Park City avalanche forecaster Craig Patterson died as a result of a very small avalanche with a very bad ride. KPCW’s Leslie Thatcher has this update.